Bag-sewing machine.



G. E. MOLYNEUX. BAG SEWING MACHINE.

APPLICATION FILED JAN. 20, 1914. 1,274,742. Patented Aug. 6, 1918.

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Zi J/QZyweaJ 5d 320% a/W Arm/Mr G. E. MOLYNEUX.

BAG SEWING MACHINE.

APPLICATION FILED JAN-2,0, 1914.

Patented Aug. 6, 1918.

3 SHEETS-SHEET 2.

A TTOH/VEY G.-E. M'OLYNEUX.

. BAG SEWING MACHINE.

APPLICATION FILEDJAN. 20, I914. 1,274,742. Patented Aug. 6, 1918.

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WITNESSES: INVENTOR 6'-\ Jung ydazy %@M UNITED STATES PATENTFOFFIOEQ GEORGE E. MOLYNEUX, OF BAYONNE, NEW JERSEY, ASSTGNOR TO THE SINGER MANU- FACTURING COMPANY, A CORPORATION NEW JERSEY.

BAG-SEWING MACHINE.

To all whom it may concern:

Be it known that I, GEORGE E. MOLYNEUX,

. a citizen of the United States, residin atmechanism for supporting and conveying a filled bag in an upright'position under and past an overhanging sewing machine for the purpose of closing the mouth of the bag by .a line of stitches, and it will be understood by. reference to the accompanying drawings in which Figure 1 is a front elevation; Fig. 2 a side elevation; Fig. 3 a top plan view; Fig. 4 a perspective view of one of the conveyer supporting brackets and the mechanism carried by it; and Fig. 5 a detail of a part of Fig. 4. Similar reference numorals indicate similar parts in the several views. v I

Referring to the'drawings, the numeral 1 designates a table provided with supporting brackets, as 16, adjustably secured by I bolts, as 17, and nuts, as 37, to suitable floor standards, as 38. Rising from'the table is a base 2 to which is secured by any suitable means a sewing machine head 3 of a well known type comprising a bracket arm 3, reciprocating needle 4, presser-foot 5, cylinder-bed-6v and cap 7, which latter covers and prevents the operator from coming in contact with the needle-bar. In the present construction the sewing machine, the mechanism for operating the latter, the bag conveying mechanism and the means for operating and adjusting the latter, are all carried by the table .1 which, through the relative adjustments of the brackets 16 with respect Ito the standards 38, are vertically adjustable to meet the requirements'of operating, conditions, as when used'in connection with differently designed weighing devices or other conditions incident to theoperating ofbag conveying and sewing devices.

Fastened to the under sid of the table 1 Specification of Letters Patent.

Application filed January 20, 1914. Serial No. 813,169.

Patented Aug. c, 1918.

are 'two right angled guide. brackets 8 and 9,

one on each side of the sewing machine, the vertlcal leg of each bracket being formed with an elongated slot 10. The brackets 8 and 9 have similar lateral extensions consistlng of nuts 11 the reduced ends of which pass through the slots 10 and have secured thereto brackets, as 12, (Fig. 4) and to the latter is secured a conveyer frame13 extend- 1ng longitudinally of the table" below the overhanging sewing machine. Supported on pintle bearings threaded into the side ,members of said frame are rollers 14 provided with openings 14 for the reception of a th1ck-oil pr grease, said openings comprlslng self-olling devices for said pintle bearings, and ateach end of the frame 13 is supported a large roller 15 and 15'. p

The roller 15' is journaled at its opposite ends into slide blocks, as 39, and into suitable openings, as 45, arranged at opposite sides of the frame 13, are threaded screws, as 42, which act on said slide blocks to adjust them singly or together to tighten the belt 18 or to direct the latter central of the frame 13,

the belt passingaround the end .rollers 15 and 15 and of a width to accommodate bags of varying sizes. In the use of'conveyers of the character of the present construction it frequently happens that the ,conveyer belt stretches slightly more at one edge than at the other, which-causes the. belt to lead out of its given line of travel, and to overcome this difiiculty is the purposeof the adjustin'g screws 42 which act to adjust the roller 15 parallel with or at a slight angle to the roller 15.

- The belt 18 is caused to travel around the end rollers 15 and 1.5 and over the rollers 14' shaft 21 is secured a driver 22 adapted tobe engaged by a driven member in the form of adouble grooved pulley 23' loose on said shaft, the driven member being shifted into engagement with thevdriver 22 by the usual foot-treadle 24 and pivbted lever 25. From pulley 23 a belt 26leads to the band-wheel of the sewing machine for the purpose of driving the latter, and a second belt 27 leads from pulley 23 around idlers 28, supported in an inclined bracket 29, to a pulley 30 on the lower end of a vertical shaft 31, said shaft having bearings in bracket 8. A worm 32 feathered on shaft 31 engages a worm-gear 33 on the shaft 34 of the end roller 15, the worm 32 being supported in a bracket 35 secured to the under side of the conveyer frame 13 (Fig. 5).

For the purpose of raising and lowering the conveyer there is provided two screws as 36, of the same pitch, one for each of the nuts 11. The. screws 36 extend upwardly through suitable openings in the table and are provided with crank handles, as 40, whereby the screws may be operated to effect vertical adjustments of the conveyer frame and belt.

The employment of the independently operated screws 36 effects an adjustment of the carrier frame favorable to the requirements of bags of variable weights, sizes and nature of contents, as it permits of an adjustment of the carrier frame slightly inclined downwardly from the horizontal and in the direction of the travel of the belt or in the opposite direction, the former adjustment being more favorable to the conveying of heavy bags of unbroken cereals, and the latter to bags of comparatively light weight containing substances as ground or granulated cereals or sugar.

The filled bags are placed upon the conveyer and by it are moved in succession into position to have the mouth carried across the cylinder-bed of the sewing machine, and in proper relation to the stitch-forming mechanism so that it may be closed by a suitable line of stitches.

A guide 41 is suitably secured to the table 1 to overhang the carrier belt 18 against which the upper end of the bag rests to properly guide it to the action of the stitch-forming mechanism. At the completion of the stitching operation the sewing threads are cut by suitable shears 43 operated by means of a treadle 44.

In the operating of bag sewing machines of the resent class by electric motors, as herein, it has been the common practice to start the motor and to eflect the transmission of power from the motor to the driven elements simultaneously through the manipulation of a single treadle, as 24.

In putting an ampere and volt meter in a circuit, as in the present instance, experience has demonstrated that to simultaneously start the motor and parts driven by it effects undue strain on both the driving and driven elements, corresponding substantially to the sflarting of a steam engine by instantly charging the steam cylinder with the full force of the steam, and in addition the constant inrush of the electric current under such conditions tends to burn out or reduce the efficiency of the motor and waste the power, and as bag sewing and carrying devices of the present class are subject to being stopped and started from 2000 to 3000 or more times per day such simultaneous control is exceptionally detrimental to the continued normal efiiciency of the motor.

In the present construction the motor is not necessarily brought to rest, when, for any purpose, the transmission of power is discontinued between the motor and parts driven by it, as will later be explained, and to better adapt the motor to picking up its load when transmitting its full energy the pulley 22 carried by the motor-shaft 21 has formed integral with it a heavy rim 45, which, in effect, makes of the pulley 22 a balance-wheel which through its momentum enables the conitinuously rotatimg motorshaft to transmit to the bag sewing and carrying mechanism the necessary power without any substantial loss or liability of interfering with the efliciency of the motor, and to better adapt the transmission of power to convenient control the electric-switch box 46 for controlling the action of the motor is located above the table and at the right of the machine convenient of inspection and manipulation. 47 represents a flexible covered wire for connecting the switch with the source of power and 48 48 like connections for connecting the motor with the switch-box 46.

Having thus set forth the nature of the invention what I claim herein is 1. In a filled bag sewing apparatus, the combination of a table, a sewing machine supported on and overhanging the edge of said table, guide-brackets secured to the under side of said table, said brackets having vertical elongated slots, lateral extensions from said brackets adjustably supported in said slots, a conveyer frame carried by said extensions and running longitudinally of the table below the sewing machine, an endless conveyer on said frame, means to effect the longitudinal travel of said conveyer includ- 7 ing an electric motor secured to the under side of said table, adjusting screws passing through said extensions each of which extends above the table and is provided with a crank-handle to effect the vertical adjustment of said frame and conveyer.

'2. In a filled bag sewing; apparatus, in combination, a table, a sewing-machine supported upon and partially overhanging the edge of said table, an electric motor arranged beneath and sustained by said table, a driving connection between said motor and said sewing machine, an endless conveyer extending beneath the overhanging portion of said sewing machine, a driving connection between said conveyer and said motor, independent means, including vertically disthe top of the table for independently raising and lowering the opposite endsof said conveyor, and hand-cranks applied to said worms above said table and accessible to the sewing machine operator from the front of said table.

In testimony whereof,- I have signed my name to this specification, in'the presence of two subscribing witnesses.

GEORGE E. MOLYNEUX. Witnesses:

WM. P. STEWART, L. E. FISCHER. 

